\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Effects of White Casualties on Share of GB Establishments}
\begin{tabular}{l*{6}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}\\
                    &\multicolumn{1}{c}{est1}&\multicolumn{1}{c}{est2}&\multicolumn{1}{c}{est3}&\multicolumn{1}{c}{est4}&\multicolumn{1}{c}{est5}&\multicolumn{1}{c}{est6}\\
\hline
Treatment           &    0.000474         &     0.00137         &    0.000234\sym{**} &    0.000399\sym{***}&  -0.0000661         &   0.0000762         \\
                    &     (0.001)         &     (0.001)         &     (0.000)         &     (0.000)         &     (0.000)         &     (0.000)         \\
\hline
Observations        &       23953         &       23953         &       36620         &       36620         &       36684         &       36684         \\
Adjusted \(R^{2}\)  &       0.668         &       0.677         &       0.744         &       0.744         &       0.638         &       0.637         \\
N\_clust             &        2957         &        2957         &        3071         &        3071         &        3070         &        3070         \\
\hline\hline
\multicolumn{7}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{7}{l}{\footnotesize Standard errors clustered by county in parentheses.         Casualties are measured in units of 100.          All columns include county and year fixed effects.}\\
\multicolumn{7}{l}{\footnotesize \sym{*} \(p<0.10\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
\end{table}
